I made a tool to change to O-rings in the fuel selector that I thought other owners might be interested in. It made sliding the rotating part of the valve that holds the O-rings and springs and balls a simple job without parts flinging around the inside of the CC. 😀

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I still loaded the balls and springs inside of the plastic bag just in case. The back side of the tool is opened to 1 diameter to slide over the OD of the housing on the valve and keep things aligned. The ID of the part holding the cartridge is .812. The long #8 screw is used as a handle. A little EZ Turn on the O-rings and it is leak-free again.

i think Ill change these out every two years regardless of condition.